Optical Counter OC-1100 is a unique device combining high sensitivity, high frequency, very low noise APD photodetector and a frequency counter. The device is enclosed in a compact and sturdy case with two outputs: analog and USB, an external clock input and a power supply connector. The analog output can be used for signal monitoring e.g. with an external spectrum analyser.
The instrument is delivered with a power supply, a USB cable and a PC software. The software allows automatic measurement of frequency deviations with averaging periods from 100µs to 1000s. The results can be displayed or stored. The software calculates also the Allan Variance of the measured signal making the device perfect for testing the frequency stability of lasers.
Optical Counter OC-1100 is especially destined for research and university laboratories.
Main specifications:
Parameter | Range |
Optical input | free space |
Spectral range | 400nm – 1000nm |
Operating temperature | 10°C – 40°C |
Bandwidth (analogue output) | ± 3 dB @ 1 MHz – 1050MHz ± 10 dB @ 0.1 MHz – 1500 MHz |
Max. incident power | 10 mW |
Maximum gain | 10 6 V/W @ 1 GHz, 800 nm |
Dark state noise level | -80 dBm (only analogue circuitry powered on) -65 dBm |
Output connectors | USB, analogue (AC coupled) |
Frequency range | 1 MHz – 1100 MHz |
Counter timebase frequency | 10 MHz |
Timebase stability | 0.05 ppm |
Measuring time | 3-1000000 s |
Min. measured power* | < 1 µW @ 1 MHz, 650 nm < 5 µW @ 1100 MHz, 650 nm |
* – below given power frequency counter does not work correctly
